I have been keeping snails for a while now, but I have been using peat filtration for a shorter while, keeping my water soft and acidic. I would also like to keep snails, knowing they will likely become a cocktail. My PH is about 6.4. I just lost one of my two long time snails, so I would like to add more (nerites, cherry and amano shrimp ideally). When the snails die, they pollute the water if I don't notice right away, putting my discus and other fish in jeopardy, or so I would assume. Does anyone keep snails in soft water by dosing with calcium from time to time. What kind of calcium alternative can I use without altering PH and hardness too much???